Things manufactured for use by humans can confront us with a humanoid spookiness. TV aerials, mobile-phone signal transmitters, even those winking traffic lights, are the totem poles and all-seeing sentinels of our urban environment, Any art, by its nature essentially useless, which resembles something useful comes across as somewhat peculiar. These forms by Gillian Brent, a welded-steel cubist-inspired sculptor, are conjured from the absurd interbreeding of human posture and the insectile elaborations of our electrified cityscape. Here, within a scaled-down landscape of grassy knolls, her towers look petrified, as if momentarily arrested in their obscure purpose.